Log and stream-indicator.



W. CORNELlS.

LOG AND STREAM INDICATOR.

APPLICATION FILED MAR. 22, 1915.

Patented July 18, 1916.

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LOG AND STREAM-INDICATO Specification of Letters Patent.

Patented July 18, 1916.

Application filed March 22, 1915. Serial No. 16,246.

To all whom it may concern Be it known that I, WVILLEM CORNELIS, a subject of the Queen of the Netherlands, residing at Utrecht, Netherlands, have invented Improvements in Logs and Stream Indicators; and I do hereby declare the following to be a full, clear, and exact description of the same.

This invention relates to improvements in logs and stream indicators by which jerks are imparted to a filament or wire to which a rotating member is attached. The rotating member according to this invention is constructed in such a manner that after a certain number of revolutions thereof, a jerkis imparted to the filament or wire. This is effected by the rotating member, after a certain number of revolutions, bringing a spring under tension and then at once releasing the spring, or, by momentarily augmenting the resistance of the water. It is to be understood, however, that the filament or wire does not rotate, but simply transfers the jerks given by the said member to the vessel, where they may be registered by a mechanism, or be felt by the hand. It is obvious that the jerks imparted to the filament or wire are separated by an interval of time, as the jerks occur regularly after a determined number of revolutions of the r0- tating member. The lapse of time between two successive jerks therefore indicates the speed of the vessel. The jerks imparted to the filament or wire may be registered by starting and stopping a chronometer, and I may graduate the dial of the chronometer, so that it gives direct readings of the speed, in a manner similar to that mentioned in the specification of my prior British Letters Patent No. 20192 D. 1912.

In the accompanying drawing, which illustrates an embodiment of the invention: Figure 1 is a diagrammatic side view of the apparatus. Fig. 2 is a longitudinal section through the rotating member on a larger scale. Fig. 3 is a side view of the mechanism of said rotating memberremoved from its cover. Fig. 4 is a front view of the hammer which effects the jerks.-

The log consists of; the rotator 1, which causes the jerks in the wire 2, and the registering device 3. The rotator consists of a casing 4: preferably of torpedo formation,

provided with one or more fins 5, arranged in such a position that the rotator is brought in rotation when drawn through the water,-

or when it is placed in flowing water. This rotator is .rotatably arranged in a frame 6, preferably of an elliptical formation. The wire 2 is now connected to this frame in such a manner that the axis of the rotator is directed slightly, downward as shown in Fig. 1 The log which has a tendency to reach the surface of ;the water is thereby kept under water. At some distance from the axis of the frame are small holes 7 through one of which the wire is drawn and attached to the frame. v

In the casing .lq'Of the rotator, a spindle Sis rigidly arrangedlying in the axis of said casing. Said spindle can be on one side connected to a disk 9, which can be screwed in the casing, when the cap 10 is removed, while the other end of the spindle is provided with aslot engaging a transverse pin 36 in the end of the casing. Any other rigid arrangement of the spindle in the casing may however be adopted. The cap or end closure 10 is threaded or otherwise securedtothe body of the casing so as to provide a water tight closure' Onthe spindle 8 is fixed a worm 11 engaging. a wormwheel 12, the former being rotatably mounted in a pendulum depending from the spindle 8 and having suitable bearings 13 and 14:. Said pendulum consists of a'frame 15 provided with one or more weights 16. In the drawing (Fig. 3) a weight 16 is'arranged on each side of the wormwheel 12 so as to'provide flarings for the spindle or shaftl'? of the wormwheel, said shaft .17 being disposed between the two weights.

To the wormwheel 12isrigidly connected a cam 18, the circumference of which is of spiral form, having a tooth 19. Against the cam 18 rests a finger 2O movable about the pivot pin '21. At the rear end of the frame I 15. a disk shaped hammer 22 is mounted movable about a pivot 23. Above the pivot 23 the hammer is connected by means of. one

understood that the connection of the rod or of a spring 26 while the other end of said spring is connected to the frame 15. The hammer is further provided with an open ing 27 through which the spindle 8 passes.

It is evident that when the log is drawn through the water, or is placed in flowing water, the rotator will revolve, that is to say, the casing 4 will rotate in the frame 6. The pendulum however will remain vertical. In consequence thereof the worm 11 will drive the wormwheel 12 together with the cam 18 in the direction of the arrow (Fig. 2). The finger 20 will thus be moved forward as said finger is moved by the spirally formed cam 18; thereby drawing the hammer 22 forward (Fig. 2) and tensioning the spring. At the moment the finger 20 passes the tooth 19 of the cam 18 the spring draws the hammer back to its original position with great force, whereby the raised portion 25 strikes the upwardly bent rear part of the frame. By this movement of the hammer a jerk is imparted to the wire to which the log is attached, as the sudden movement of the heavy hammer striking the frame 15, extends to move the log rear-wardly.

The ratio of gearing between the worm and wormwheel is such that a certain number of revolutions of the casing 4: corresponding to a certain distance traveled by the log or the ship, say for instance, one tenth of a nautical mile, causes the wormwheel 12 with the cam 18 to make one revolution. Each jerk imparted to the wire then indicates a certain distance traveled by the ship.

In order to register the jerks imparted to the wire, said wire is, on board the ship, connected to a rod 28 (Fig. 1), which rod is again connected to a spring 29. The jerks in the wire will then tension the spring 29 which, however, will also be tensioned when by some influence or other the tension ofthe wire is augmented gradually. The registration of the jerks only is therefore effected according to the invention in the following manner: To the rod 28 the piston rod 30 of a brake cylinder 31 is connected. The cylinder of the brake is hinged to an object connected rigidly with the ship and so is the spring 29. Preferably the spring 29, the rod 28 and the brake and an ordinary counting device are located in a box 32, which latter may be placed on the bridge of the ship. The plunger of the brake is a trifle smaller than the inside diameter of the cylinder 31. The brake is filled with a suitable fluid, preferably glycerin. Such brakes oppose as known a large force against a sudden movement of the piston in the cylinder, while a small, gradually working force acting upon the piston will readily move the piston in the cylinder. The axis of the brake is placed at an angle to the rod 28. When a jerk occurs in the wire the spring 29 will be tensioned and the rod 28 will tend to displace itself in the direction of its own axis. However the piston rod 30 does not allow this sudden movement, the consequence of which is that the brake turns about the hinge 33 and thereby displaces the rod 28 laterally. This lateral movement of the rod 28 is now utilized to operate a countingmechanism, which is intended to be inclosed in the box 34;. According to the arrangement illustrated in the drawing (Fig. 1) the rod 28 will be drawn downward and thereby operate the counting-mechanism.

WVhat I claim is:

1. A ship log comprising the combination of registering mechanism, a rotatable memher, an element connecting said member and said registering mechanism, and means operated by the rotation of said member for causing intermittent movements of the latter, said movements placing additional tension on said connecting element, whereby said movements are transmitted to said registering mechanism, and the latter is operated.

2. The combination with registration mechanism, of a ship log comprising a rotatable casing, a pendulum within the easing, a hammer pivoted on said pendulum, means mounted on said pendulum and actuated by the rotation of said casing for op erating said hammer whereby shock is caused in said casing, and means for connecting said casing and registering mechanism.

8. The combination -with registering mechanism, of a ship log comprising a rotatable casing, a pendulum mounted within the casing, a hammer pivoted on said pendulum, a cam mounted on said pendulum and rotated by the movement of said casing, means connected with said hammer and actuated by said cam for operating said hammer to cause a shock within said casing, and means connecting said casing with said registering mechanism, whereby said shock is registered.

4. A ship log comprising a rotatable casing, a pendulum within the casing, a hammer pivoted on said pendulum, and means mounted on said pendulum and actuated by the rotation of the casing for operating said hammer to cause a shock within the casing.

5. The combination with a registering mechanism, of a fluid-operated rotatable member, an element connecting said registering mechanism and said member, and means actuated by the rotation of said member for causing intermittent movements of the latter, said element being adapted to communicate said movements to said registering mechanism whereby the latter is operated.

6. The combination with a registering mechanism, of a fluid-operated rotatable member, an element connecting said registering mechanism and said member, means actuated by the rotation of said member for causing a shock Within the casing, said element being adapted to communicate said shock to said registering mechanism Whereby said shock is registered, and shock absorbing means connected with said element 10 whereby undue tension is resisted.

In testimony whereof I have signed my name to this specification in the presence of two subscribing Witnesses.

WILLEM CORNELIS.

Witnesses:

ANTON DE NAGHEGSALZ, G. EVANS HUBBARD.

Copies of this patent may be obtained for five cents each, by addressing the Commissioner of Patents, Washington, I). O. 

